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2 Chloride analyses of water from wells in
Seminole County ........................

3 Records of wells in Seminole County ......

:;-ri~-::::-~;~i~.-~~ ------;

GROUND-WATER RECORDS
OF
SEMINOLE COUNTY, FLORIDA

By
Jack T. Barraclough

INTRODUCTION

The primary purpose of the investigation leading to
the report of which this is the basic data section was to
determine the extent to which salt water had encroached
into the water-bearing formations of Seminole County and
to evaluate the factors governing encroachment. Field
work for this study, begun in 1951 by the U. S. Geological
Survey in cooperation with the Florida Geological Survey,
the Board of County Commissioners of Seminole County,
and the city of Sanford, was completed in 1956. The inter-
pretive results of the study are given in a report entitled
"Ground-Water Resources of Seminole County, Florida, "
by Jack T. Barraclough, published by the Florida Geological
Survey as Report of Investigations No. 27.

Seminole County is in the east-central part of the
Florida Peninsula (fig. 1). The well-numbering system used
in this report is based on the latitude-longitude grid system
(fig. 2). The locations of the wells are shown on a map of
Seminole County (f:g. 3).

Water levels and artesian pressures, in feet above
mean sea level, measured during the study are given in
table 1.

Field determinations of the chloride content, in parts
per million, of water from wells in Seminole County are
S'given in table 2.

Samples of water were periodically collected from
selected wells and analyzed for chloride content in order
to determine trends of mineralization and to investigate the
possibility of correlation between changes in concentration
of chloride and changes in water level.

Records of 874 wells in Seminole County are given in
table 3.

Figure 1. Florida Peninsula showing the location of Seminole
CCounty.

3.

Latitude-longitude well-numbering system.

Figure 2.

."_,: D STATES DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY

FLORIDA GEOLOGICAL SURVEY
R \Vrnon r:-ratnr

R 29 E

R 30 E

R 31 E

R 32 IE

R 33 E

mom

- 2,4 2848 .o sO 4

71
,- -- I "Vc- v 1

S -.. .- ".. H

i ,
-- 2 S 1-E
A 11A, LAKE O R

8.25O I VLN_08 5

o j..2
--* 4 NT4

.R ,- --- ---

81\25' 8120 815 21
ST C,7Y 43E'Y
115 41
la. Z. 2

Vb 3 SAVA -ILIOT
O7

17 .2 49
r~lA \~2 G
F, 92

81*5'8120'8115

I I C I P ~2 F I IR 33

5cse rcKen from mecs of
-,or ac State Rocd Department-

R 29 E I tu 1 L I
Well inventory by Jack T. Borraclougk

and Ralph C. Heath

Figure 3. Seminole County showing locations of wells.

81025' 8l2 ; 81815' 81o 1' 8105'

EXPLANATION
.2

O O iwell

"vL LAKE MONROEI 0 SET "

-28o45'

I

-4d-

81000

C

[

m`'u. vernun, utrec -- -o

7z7z C

.L

8100 '

T 28 50'-

,, x

R :1

0 'k )

_I

Table 1. Water Levels and Artesian Pressure in Wells in Seminole County

(All measurements are in feet above mean sea level)

N. F.: Water not flowing from well on date of visit.
P: Well pumping at time of measurement.
Note: Other water level measurements are in table 3.

II

Well Water Water Water i.ater
number Date level Date level Date level Date level